There are two types of rows in document_files table - that have active=1 or active=0. Each document (document_id) can have multiple rows of each type. The goal is to for every document select all rows that have active=1, but only the latest one of all rows that have active=0.
select *
from documents d
inner join document_files df on df.document_id = d.id
where ...
-- df.active = 1, select them all
-- or df.active = 0, only select max(df.last_stamp) of all df.active=0 rows for this df.document_id
How to achieve this?
I'd use union and group by, but the problem is that a lot of columns are returned, and it wouldn't be optimal to group them all.
This section only get the document files with no active record and after that using max () gets the most recent record for the item:
select document_id
from (select * from document_files f where f.document_id not in
(select document_id from document_files where active = 1)) dff where dff.last_stamp =
(
select max(i.last_stamp) from document_files i where i.document_id = dff.document_id
)
My final sql :
select *
from documents d
inner join document_files df on df.document_id = d.id
where df.active = 1 or
df.document_id in
(
select document_id
from (select * from document_files f where f.document_id not in
(select document_id from document_files where active = 1)) dff where dff.last_stamp =
(
select max(i.last_stamp) from document_files i where i.document_id = dff.document_id
)
)
Please add some sql fiddle next time so we can test the result
Related
I need Only one unique result from tableB.Field to tableA.Field
I am using sdo operator sdo_nn, this is the code:
UPDATE table1 t1
SET t1.fieldA = (SELECT T2.fieldB,SDO_NN_DISTANCE(1) distance
FROM table1 T1, table2 T2
WHERE
(sdo_nn(t1.geometry,t2.geometry,'SDO_NUM_RES=1',1)= 'TRUE')
ORDER BY DIST
)
WHERE EXISTS(
SELECT 1
FROM table2 t2
WHERE sdo_nn(t1.geometry, t2.geometry,'SDO_NUM_RES=1',1)='TRUE'
AND(t2.cell_name = 'string1' or t2.cell_name = string2')AND t1.fieldA = NULL
);
In the select sentence of the subquery i get an error because i only use one field(t1.fieldA), but in the sentence i use the operator SDO_NN_DISTANCE(1) and the sql developer count this operator like another field. What is the correct way to write this sentence? I only use sql because i need to insert this code in vba
Thanks!!!
Obviously, you can't (simplified)
set t1.fieldA = (t2.fieldB, distance) --> you want to put two values into a single column
Therefore, get fieldB alone from the subquery which uses analytic function (row_number) to "sort" rows by sdo_nn_distance(1) desc; then get the first row's fieldB value.
Something like this (I hope I set the parenthesis right):
UPDATE table1 t1
SET t1.fieldA =
(SELECT x.fieldB --> only fieldB
FROM (SELECT T2.fieldB, --> from your subquery
SDO_NN_DISTANCE (1) distance,
ROW_NUMBER ()
OVER (ORDER BY sdo_nn_distance (1) DESC) rn
FROM table1 T1, table2 T2
WHERE (sdo_nn (t1.geometry,
t2.geometry,
'SDO_NUM_RES=1',
1) = 'TRUE')) x
WHERE rn = 1) --> where RN = 1
WHERE EXISTS
(SELECT 1
FROM table2 t2
WHERE sdo_nn (t1.geometry,
t2.geometry,
'SDO_NUM_RES=1',
1) = 'TRUE'
AND ( t2.cell_name = 'string1'
OR t2.cell_name = 'string2')
AND t1.fieldA IS NULL);
In this query, I want to use with-statement. I have a subquery that calculates A union all B and I want to use it with with-statement. But when I use with-statement I face the error that says "table or view does not exist".
what surprises me is when I replace the first part with with-statement it works correctly. But when I replace the second part, I face this error!!
select
deposit.BRNCH_COD||'-'||deposit.DP_TYPE_COD||''||deposit.CUSTOMER_NUM||'-
'||deposit.DEPOSIT_SERIAL AS DEPOSIT_NUMBER,
deposit.IBAN AS IBAN,
deposit.CURRENCY_DESC AS DEPOSIT_CURRCOD,
deposit.BRNCH_COD AS BRNCH_COD,
MAIN_7.Still_Days
AS Still_Lenght,
to_char(MAIN_7.Startdate, 'yyyy/mm/dd' ,'nls_calendar=persian') AS
START_DATE,
MAIN_7.AMOUNT
AS TOTAL_AMOUNT,
MAIN_7.TRN_Count
AS TRN_Count
from
(
select Trans_Table.DEPOSIT_KEY AS DEPOSIT_KEY,
Trans_Table.TRN_Start_DATE AS Startdate,
MAX(Active_Time_Table.EFFECTIVE_DATE) AS Lastdate,
H.PASSIVE_DAYS AS Still_Days,
SUM(Active_Time_Table.AMOUNT) AS AMOUNT,
Count(Active_Time_Table.AMOUNT) AS TRN_Count
from
(
Select F.DEPOSIT_KEY,
SUM (F.AMOUNT) AS TRN_AMOUNT,
MIN (F.EFFECTIVE_DATE) AS TRN_Start_DATE
from
(
A
union all
B
)F
Group by (F.DEPOSIT_KEY)
Having ( SUM (F.AMOUNT) >10000000000)
)Trans_Table
inner join
H
on (Trans_Table.DEPOSIT_KEY = H.DEPOSIT_KEY and
Trans_Table.TRN_Start_DATE-1 = H.EFFECTIVE_DATE)
inner join
(
A
union all
B
)Active_Time_Table
on (Trans_Table.DEPOSIT_KEY = Active_Time_Table.DEPOSIT_KEY and
Active_Time_Table.EFFECTIVE_DATE - Trans_Table.TRN_Start_DATE< 4 and
Active_Time_Table.EFFECTIVE_DATE - Trans_Table.TRN_Start_DATE>=0)
group by ( Trans_Table.DEPOSIT_KEY ,
Trans_Table.TRN_Start_DATE,H.PASSIVE_DAYS)
Having (SUM(Active_Time_Table.AMOUNT)) > 10000000000
)MAIN_7
inner join dimamldeposit deposit
on deposit.DEPOSIT_KEY = MAIN_7.DEPOSIT_KEY
***********************************************************
with rep as
(A union all B)
select
deposit.BRNCH_COD||'-'||deposit.DP_TYPE_COD||'-
'||deposit.CUSTOMER_NUM||'-'||deposit.DEPOSIT_SERIAL AS DEPOSIT_NUMBER,
deposit.IBAN AS IBAN,
deposit.CURRENCY_DESC AS DEPOSIT_CURRCOD,
deposit.BRNCH_COD AS BRNCH_COD,
MAIN_7.Still_Days AS Still_Lenght,
to_char(MAIN_7.Startdate, 'yyyy/mm/dd' ,'nls_calendar=persian') AS START_DATE,
MAIN_7.AMOUNT AS TOTAL_AMOUNT,
MAIN_7.TRN_Count AS TRN_Count
from
(
select Trans_Table.DEPOSIT_KEY AS DEPOSIT_KEY,
Trans_Table.TRN_Start_DATE AS Startdate,
MAX(rep.EFFECTIVE_DATE) AS Lastdate,
H.PASSIVE_DAYS AS Still_Days,
SUM(rep.AMOUNT) AS AMOUNT,
Count(rep.AMOUNT) AS TRN_Count
from
(
Select rep.DEPOSIT_KEY,
SUM (rep.AMOUNT) AS TRN_AMOUNT,
MIN (rep.EFFECTIVE_DATE) AS TRN_Start_DATE
from
rep
Group by (rep.DEPOSIT_KEY)
Having ( SUM (rep.AMOUNT) >10000000000)
)Trans_Table
inner join
H
on (Trans_Table.DEPOSIT_KEY = H.DEPOSIT_KEY and Trans_Table.TRN_Start_DATE-1 = H.EFFECTIVE_DATE)
inner join
rep rep
on (Trans_Table.DEPOSIT_KEY = rep.DEPOSIT_KEY and rep.EFFECTIVE_DATE - Trans_Table.TRN_Start_DATE< 4 and rep.EFFECTIVE_DATE - Trans_Table.TRN_Start_DATE>=0)
group by ( Trans_Table.DEPOSIT_KEY , Trans_Table.TRN_Start_DATE,H.PASSIVE_DAYS)
Having (SUM(rep.AMOUNT)) > 10000000000
)MAIN_7
inner join dimamldeposit deposit
on deposit.DEPOSIT_KEY = MAIN_7.DEPOSIT_KEY
That's a lot of code, but - to make it simple, I'd suggest you use WITH factoring clause as the first command, include all tables you use into it, and then - as the final SELECT - fetch data from all those CTEs. Something like this:
with
a as (select ... from ...),
b as (select ... from ...),
f as (select ... from ...),
...
select a.col1, b.col2, f.col3
from a join b on a.id = b.id
left join f on f.id = b.id
where ...
I am attempting to respond to the insertion of a row in one table (A) to create or update multiple rows in a second table (B) based on the values of a third table (C) (which can be joined to the first).
I have the following construct,
CREATE TRIGGER MyTrigger AFTER INSERT ON A
BEGIN
INSERT OR REPLACE INTO B (ID, T1, T2, Role)
VALUES
(
( SELECT ID FROM C WHERE R1 = NEW.R1 ),
NEW.T1,
B.T2, -- The existing row's T2
( SELECT Role FROM C WHERE R1 = NEW.R1 ),
)
END;
Table A has columns ID, T1, R1
Table B has columns ID, T1, T2, Role
Table C has columns ID, R1, R2, Role
I have at least two problems with my attempts at composing the trigger
I don't know how to reference B's existing values in the REPLACE case, thus the "B.T2"
I don't know how to reference multiple columns (R1, Role) from the same row in table C when doing my INSERT/REPLACE in table B.
Thanks for any help in sorting this out.
Using SELECT instead of VALUES:
CREATE TRIGGER MyTrigger AFTER INSERT ON A BEGIN
INSERT OR REPLACE INTO B (ID, T1, T2, Role) SELECT
(SELECT ID FROM C WHERE R1 = NEW.R1),
NEW.T1,
B.T2,
(SELECT Role FROM C WHERE R1 = NEW.R1)
FROM B WHERE ROWID=NEW.ROWID
END;
I was able to use a LEFT OUTER JOIN on the SELECT so that all the needed values can be named regardless of whether there's an existing row.
CREATE TRIGGER MyTrigger AFTER INSERT ON A
BEGIN
INSERT OR REPLACE INTO B (ID, T1, T2, Role)
SELECT
C.ID,
NEW.T1,
B.T2,
C.Role
FROM C LEFT OUTER JOIN B ON C.ID = B.ID WHERE C.R1 = NEW.R1;
END;
To find the B record, just use a subquery like you're doing with C.
The B.ID value to search for is the same as that you're trying to insert.
CREATE TRIGGER MyTrigger
AFTER INSERT ON A
BEGIN
INSERT OR REPLACE INTO B (ID, T1, T2, Role)
VALUES
(
( SELECT ID FROM C WHERE R1 = NEW.R1 ),
NEW.T1,
( SELECT T2 FROM B WHERE ID = ( SELECT ID FROM C WHERE R1 = NEW.R1 ) ),
( SELECT Role FROM C WHERE R1 = NEW.R1 )
);
END;
I'm having a hard time converting my sybase script into an Oracle 11g script. I used the translation tool but I got even more confuse with the Rowid.
Is there any easier way to do it without using rowid so it's easier for me, who just learn Oracle, to digest?
Here is my Sybase script:
delete table_1
from table_1 a, table_2 b
where (select count(*) from table_2
where a.id = id
and a.seq = seq
and a.gcode = gcode
and a.gtype = gtype) = 0
and a.id = b.id
and a.seq = b.seq;
Here is the result from Oracle SQL development translation tool:
DELETE table_1
WHERE ROWID IN
( SELECT a.ROWID
FROM table_1 a,
table_2 b
WHERE ( SELECT COUNT(*)
FROM table_2
WHERE a.id = id
AND a.seq = seq
AND a.gcode = gcode
AND a.gtype = gtype ) = 0
AND a.id = b.id
AND a.seq = b.seq );
Is it safe to write using ID instead of RowId?:
IDs in both table_1 and table_2 refer to the same PK. Table_1 and table_2 are mirror of each other.
DELETE table_1
WHERE ID IN
( SELECT DISTINCT a.ID
FROM table_1 a,
table_2 b
WHERE ( SELECT COUNT(*)
FROM table_2
WHERE a.id = id
AND a.seq = seq
AND a.gcode = gcode
AND a.gtype = gtype ) = 0
AND a.id = b.id
AND a.seq = b.seq );
Rowid identifies a row. Two rows cannot have the same rowid. If the id in your table is the primary key (not part if a composite key) then you basically achieve the same by using id. However rowid is generally provides faster access as it references the physical location of a row and does not have to access the row by using the index.
beware of partitioning. There can be same rowid on different partitions, so the above statement about uniqnuness of rowid is not valid for partitioned tables
I've got a query that looks something like this:
SELECT
*
FROM table
WHERE
(col1, col2) in (
('col1_val1', 'col2_val1'),
('col1_val2', 'col2_val2'),
('col1_val3', 'col2_val3'),
)
This works in MySQL, but fails in sqlite3 with a syntax error:
Error: near ",": syntax error
How can I rewrite this query to an equivalent one that works in sqlite3?
Choose your favourite version:
http://sqlfiddle.com/#!5/6169b/9
using temporary table
CREATE TEMPORARY TABLE pair (a INTEGER, b INTEGER);
INSERT INTO pair (a, b) VALUES (1, 1);
INSERT INTO pair (a, b) VALUES (2, 2);
....
data IN pairs; if pair(a,b) is not unique
SELECT *
FROM data
WHERE EXISTS (
SELECT NULL
FROM pair
WHERE pair.a = data.a
AND pair.b = data.b
);
data IN pairs; if pair(a,b) is unique
SELECT data.*
FROM data
INNER JOIN pair
ON pair.a = data.a
AND pair.b = data.b;
data NOT IN pairs; if pair(a,b) is unique
SELECT data.*
FROM data
LEFT JOIN pair
ON pair.a = data.a
AND pair.b = data.b
WHERE pair.a IS NULL
OR pair.b IS NULL;
using inline table
data IN pairs; if pair(a,b) is not unique
SELECT *
FROM data
WHERE EXISTS (
SELECT NULL
FROM (
SELECT 1 AS a, 1 AS b
UNION ALL
SELECT 2 AS a, 2 AS b
UNION ALL
SELECT 3 AS a, 3 AS b
) AS pair
WHERE pair.a = data.a
AND pair.b = data.b
);
data IN pairs; if pair(a,b) is unique
SELECT data.*
FROM data
INNER JOIN (
SELECT 1 AS a, 1 AS b
UNION ALL
SELECT 2 AS a, 2 AS b
UNION ALL
SELECT 3 AS a, 3 AS b
) AS pair
ON pair.a = data.a
AND pair.b = data.b;
data NOT IN pairs; if pair(a,b) is unique
SELECT data.*
FROM data
LEFT JOIN (
SELECT 1 AS a, 1 AS b
UNION ALL
SELECT 2 AS a, 2 AS b
UNION ALL
SELECT 3 AS a, 3 AS b
) AS pair
ON pair.a = data.a
AND pair.b = data.b
WHERE pair.a IS NULL
OR pair.b IS NULL;
Here's an easy solution that works, but it might not perform well on large data sets because it can't use any of your indexes.
SELECT * FROM table
WHERE col1 || '-' || col2 in (
'col1_val1-col2_val1',
'col1_val2-col2_val2',
'col1_val3-col2_val3'
)
Try it in sqlfiddle
Enjoy!
In sqlite try to add the VALUES keyword:
SELECT *
FROM table
WHERE
(col1, col2) in ( VALUES --> add this keyword and remove the last ,
('col1_val1', 'col2_val1'),
('col1_val2', 'col2_val2'),
('col1_val3', 'col2_val3')
)
Basically in sqLite executing the query:
VALUES
('col1_val1', 'col2_val1'),
('col1_val2', 'col2_val2');
is the same as:
SELECT 'col1_val1' AS column1, 'col2_val1' AS column2
UNION
SELECT 'col1_val2' AS column1, 'col2_val2' AS column2;
or combined:
SELECT 'col1_val1' AS column1, 'col2_val1' AS column2
UNION VALUES ('col1_val2', 'col2_val2');
So you could even write it like:
SELECT *
FROM table
WHERE (col1, col2) IN (
SELECT 'col1_val1', 'col2_val1'
UNION
SELECT 'col1_val2', 'col2_val2'
);
which is a simple subquery and works in all/most databases.